| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it be [adj] [verb] [adj] [noun pl] | 653 |
|
| 2 | it be necessary [verb] [adj] [noun] | 120 |
|
| 3 | [pron] be necessary [verb] [adj] [noun pl] | 61 |
|
| 4 | it [be] necessary [verb] [adj] [noun pl] | 60 |
|
